Livestock Waste Testing Laboratory (LWTL)
Reports : Click on the Report Icon
1.Poultry litter sample report
2.Dairy effluent sample report
General Report Interpretations
Within each report, a nitrogen and a phosphorus based recommendation are included determined by the crop chosen and the nutrient values in the sample. Nutrient values in the raw sample are provided in page two of the report. Economic value of the manure is based on quarterly fertilizer prices using ammonium nitrate, concentrated superphosphate (0-46-0) and potassium chloride (0-0-60) at current market prices.
The bar graph given on page one of each report includes compensation for nitrogen losses during application for liquid and solid samples. Percent loss depends on the type of manure and the application method. Solids generally have a 5% expected loss. If manure is not incorporated into the soil within 24 hours, assume a 25% loss of nitrogen (N) due to volatilization. Liquid applications have an automatic 25 % N volatilization loss before they are stabilized in the soil. For liquid samples up to a 25% N loss is accounted for if pH is greater than 7.0 and an additional 25% N loss is also assumed when sprinklers are the method of application.
Application rates are given on an individual crop basis based on IFAS recommendations assuming a LOW Phosphorus (P) and Potassium (K) soil test. Splitting applications in three separate dosages is encouraged following IFAS Best Management Practices. A standard soil fertility test should be run TWICE per year for maximum effectiveness.